Process of producing sulfur derivatives of hydrocarbons.



WILHELM STEINKOPF, 0F KARLSRUHE, GERMANY.

PROCESS OF I'RODUCIITG SULFU'R DERIVATIVES 0F HYDROCARBONS.

No Drawing.

Specification of Letters Patent.

Patented Feb. 3,191d.

Application filed July 8, 1912. Serial No. 708,194.

To all whom it may concern:

Be it known that I, Dr. Ing. WILHELM Srnmxorr, a citizen of the GermanEmpire, residing at Karlsruhe, Germany, have invented certain new anduseful Improvements in the Process of Producing Sulfur Derivatives ofHydrocarbons, of which the following is a specification.

On conducting ethylene or coal gas over heated pyrite or acetylenethrough heated sulfur a formation of thiophen takes place as first shownby V. Meyer, however the quantity of thiophen so formed is quiteinsignificant. It was now found that a good yield of thiophen and othersulfur derivatives of hydrocarbons is obtained, if acetylene, oracetylene diluted with hydrogen, sulfureted hydrogen, and other gases,not affected by this reaction, is conducted over pyrites at about 300centigrade.

Example: Finely powdered pyrites were heated in an iron tube, providedwith an endless screw, to 300320- for six hours; 120440 liters ofacetylene were led over per hour under a continual renewal of thepyrites (in all 5 kg. pyrites). The gases on leaving were cooled, firstin a water cooler, then in a cooling mixture of ice and salt, andfinally led through a washing tower supplied with well cooled paraffinoil. The gases now leaving consisted of hydrogen, acetylene, andlow-boiling sulfur derivatives of hydrocarbons. On distilling theparaffin oil and fractionating the distillate, the following portionswere obtained: An oil boiling at 3638 and containing approximately 60%sulfur and 30% carbon. (2.) Thiophen. tives of the hydrocarbons,distilling with decomposition under the pressure of the free atmosphere.In all 500 grams distillate were obtained from 750 liters of acetylene.The yield was distributed among the three distillates as follows:Approximately 7%. (2.) Approximately 41%. (3) Approximately 40%.

Markasit, synthetical FeS and in general (3.) Higher sulfur deriva-vthose substances which liberate sulfur on heating, can be used insteadof pyrites with the same results. The addition of a small quantity ofsulfur to the heated solids does not appear to influence the reaction.The formation of thiophen starts at about 260, it still takes place at400 and over, but the best yields were obtained at 300320.

The lowand high-boiling sulfur derivatives of hydrocarbons so producedmay be used as pharmaceutical preparations and for other purposes.

What I claim is 1. Process of producing sulfur derivatives ofhydrocarbons consisting in conducting acetylene containing gas at atemperature of about 300 -centigrade over sulfids adapted to split offsulfur on heating.

2. Process of producing sulfur derivatives of hydrocarbons consisting inconducting acetylene containing gas over pyrites at a temperature ofabout 300 Centigrade.

3. Process of producing thiophen consists ing in conducting acetylenecontaining gas at a temperature of about 300 centigrade over sulfidsadapted to split off sulfur on heating, and isolating the thiophen fromthe gaseous product of reaction.

4:- Process of producing thiophen consist ing in "conducting acetylenecontaining gas over pyrites at a temperature of about 300 centigrade,and isolating the thiophen from the gaseous product of reaction.

5. Process of manufacturing thiophen consisting in conducting acetylenecontaining gas at a temperature of about 300 centigrade over sulfidsadapted to split oif sulfur on heating condensing the gaseous productsof reaction and isolating the formed thiophen by fractionaldistillation.

In testimony whereof I affix my signature in presence of two witnesses.

DB. Inc. WILHELM STEINKOPF.

Witnesses:

ARNOLD E. HURMS, FRIEDRICH SCHMIDT.

